2 * Copyright © 2008 Intel Corporation
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
28 #include "intel_drv.h"
29 #include <drm/drm_crtc_helper.h>
30 #include <drm/drm_edid.h>
32 static bool intel_dp_mst_compute_config(struct intel_encoder
*encoder
,
33 struct intel_crtc_config
*pipe_config
)
35 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
36 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
37 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
38 struct drm_device
*dev
= encoder
->base
.dev
;
40 int lane_count
, slots
;
41 struct drm_display_mode
*adjusted_mode
= &pipe_config
->adjusted_mode
;
42 struct intel_connector
*found
= NULL
, *intel_connector
;
45 pipe_config
->dp_encoder_is_mst
= true;
46 pipe_config
->has_pch_encoder
= false;
47 pipe_config
->has_dp_encoder
= true;
50 * for MST we always configure max link bw - the spec doesn't
51 * seem to suggest we should do otherwise.
53 lane_count
= drm_dp_max_lane_count(intel_dp
->dpcd
);
54 intel_dp
->link_bw
= intel_dp_max_link_bw(intel_dp
);
55 intel_dp
->lane_count
= lane_count
;
57 pipe_config
->pipe_bpp
= 24;
58 pipe_config
->port_clock
= drm_dp_bw_code_to_link_rate(intel_dp
->link_bw
);
60 list_for_each_entry(intel_connector
, &dev
->mode_config
.connector_list
, base
.head
) {
61 if (intel_connector
->new_encoder
== encoder
) {
62 found
= intel_connector
;
68 DRM_ERROR("can't find connector\n");
72 mst_pbn
= drm_dp_calc_pbn_mode(adjusted_mode
->clock
, bpp
);
74 pipe_config
->pbn
= mst_pbn
;
75 slots
= drm_dp_find_vcpi_slots(&intel_dp
->mst_mgr
, mst_pbn
);
77 intel_link_compute_m_n(bpp
, lane_count
,
78 adjusted_mode
->crtc_clock
,
79 pipe_config
->port_clock
,
80 &pipe_config
->dp_m_n
);
82 pipe_config
->dp_m_n
.tu
= slots
;
87 static void intel_mst_disable_dp(struct intel_encoder
*encoder
)
89 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
90 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
91 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
94 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
96 drm_dp_mst_reset_vcpi_slots(&intel_dp
->mst_mgr
, intel_mst
->port
);
98 ret
= drm_dp_update_payload_part1(&intel_dp
->mst_mgr
);
100 DRM_ERROR("failed to update payload %d\n", ret
);
104 static void intel_mst_post_disable_dp(struct intel_encoder
*encoder
)
106 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
107 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
108 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
110 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
113 drm_dp_check_act_status(&intel_dp
->mst_mgr
);
114 /* and this can also fail */
115 drm_dp_update_payload_part2(&intel_dp
->mst_mgr
);
117 drm_dp_mst_deallocate_vcpi(&intel_dp
->mst_mgr
, intel_mst
->port
);
119 intel_dp
->active_mst_links
--;
120 intel_mst
->port
= NULL
;
121 if (intel_dp
->active_mst_links
== 0) {
122 intel_dig_port
->base
.post_disable(&intel_dig_port
->base
);
123 intel_dp_sink_dpms(intel_dp
, DRM_MODE_DPMS_OFF
);
127 static void intel_mst_pre_enable_dp(struct intel_encoder
*encoder
)
129 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
130 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
131 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
132 struct drm_device
*dev
= encoder
->base
.dev
;
133 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
134 enum port port
= intel_dig_port
->port
;
137 struct intel_connector
*found
= NULL
, *intel_connector
;
139 struct drm_crtc
*crtc
= encoder
->base
.crtc
;
140 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
142 list_for_each_entry(intel_connector
, &dev
->mode_config
.connector_list
, base
.head
) {
143 if (intel_connector
->new_encoder
== encoder
) {
144 found
= intel_connector
;
150 DRM_ERROR("can't find connector\n");
154 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
155 intel_mst
->port
= found
->port
;
157 if (intel_dp
->active_mst_links
== 0) {
158 enum port port
= intel_ddi_get_encoder_port(encoder
);
160 I915_WRITE(PORT_CLK_SEL(port
), intel_crtc
->config
.ddi_pll_sel
);
162 intel_ddi_init_dp_buf_reg(&intel_dig_port
->base
);
164 intel_dp_sink_dpms(intel_dp
, DRM_MODE_DPMS_ON
);
167 intel_dp_start_link_train(intel_dp
);
168 intel_dp_complete_link_train(intel_dp
);
169 intel_dp_stop_link_train(intel_dp
);
172 ret
= drm_dp_mst_allocate_vcpi(&intel_dp
->mst_mgr
,
173 intel_mst
->port
, intel_crtc
->config
.pbn
, &slots
);
175 DRM_ERROR("failed to allocate vcpi\n");
180 intel_dp
->active_mst_links
++;
181 temp
= I915_READ(DP_TP_STATUS(port
));
182 I915_WRITE(DP_TP_STATUS(port
), temp
);
184 ret
= drm_dp_update_payload_part1(&intel_dp
->mst_mgr
);
187 static void intel_mst_enable_dp(struct intel_encoder
*encoder
)
189 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
190 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
191 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
192 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
193 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
194 enum port port
= intel_dig_port
->port
;
197 DRM_DEBUG_KMS("%d\n", intel_dp
->active_mst_links
);
199 if (wait_for((I915_READ(DP_TP_STATUS(port
)) & DP_TP_STATUS_ACT_SENT
),
201 DRM_ERROR("Timed out waiting for ACT sent\n");
203 ret
= drm_dp_check_act_status(&intel_dp
->mst_mgr
);
205 ret
= drm_dp_update_payload_part2(&intel_dp
->mst_mgr
);
208 static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder
*encoder
,
211 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
212 *pipe
= intel_mst
->pipe
;
218 static void intel_dp_mst_enc_get_config(struct intel_encoder
*encoder
,
219 struct intel_crtc_config
*pipe_config
)
221 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(&encoder
->base
);
222 struct intel_digital_port
*intel_dig_port
= intel_mst
->primary
;
223 struct intel_crtc
*crtc
= to_intel_crtc(encoder
->base
.crtc
);
224 struct drm_device
*dev
= encoder
->base
.dev
;
225 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
226 enum transcoder cpu_transcoder
= crtc
->config
.cpu_transcoder
;
229 pipe_config
->has_dp_encoder
= true;
231 temp
= I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder
));
232 if (temp
& TRANS_DDI_PHSYNC
)
233 flags
|= DRM_MODE_FLAG_PHSYNC
;
235 flags
|= DRM_MODE_FLAG_NHSYNC
;
236 if (temp
& TRANS_DDI_PVSYNC
)
237 flags
|= DRM_MODE_FLAG_PVSYNC
;
239 flags
|= DRM_MODE_FLAG_NVSYNC
;
241 switch (temp
& TRANS_DDI_BPC_MASK
) {
242 case TRANS_DDI_BPC_6
:
243 pipe_config
->pipe_bpp
= 18;
245 case TRANS_DDI_BPC_8
:
246 pipe_config
->pipe_bpp
= 24;
248 case TRANS_DDI_BPC_10
:
249 pipe_config
->pipe_bpp
= 30;
251 case TRANS_DDI_BPC_12
:
252 pipe_config
->pipe_bpp
= 36;
257 pipe_config
->adjusted_mode
.flags
|= flags
;
258 intel_dp_get_m_n(crtc
, pipe_config
);
260 intel_ddi_clock_get(&intel_dig_port
->base
, pipe_config
);
263 static int intel_dp_mst_get_ddc_modes(struct drm_connector
*connector
)
265 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
266 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
270 edid
= drm_dp_mst_get_edid(connector
, &intel_dp
->mst_mgr
, intel_connector
->port
);
274 ret
= intel_connector_update_modes(connector
, edid
);
280 static enum drm_connector_status
281 intel_mst_port_dp_detect(struct drm_connector
*connector
)
283 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
284 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
286 return drm_dp_mst_detect_port(&intel_dp
->mst_mgr
, intel_connector
->port
);
289 static enum drm_connector_status
290 intel_dp_mst_detect(struct drm_connector
*connector
, bool force
)
292 enum drm_connector_status status
;
293 status
= intel_mst_port_dp_detect(connector
);
298 intel_dp_mst_set_property(struct drm_connector
*connector
,
299 struct drm_property
*property
,
306 intel_dp_mst_connector_destroy(struct drm_connector
*connector
)
308 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
310 if (!IS_ERR_OR_NULL(intel_connector
->edid
))
311 kfree(intel_connector
->edid
);
313 drm_connector_cleanup(connector
);
317 static const struct drm_connector_funcs intel_dp_mst_connector_funcs
= {
318 .dpms
= intel_connector_dpms
,
319 .detect
= intel_dp_mst_detect
,
320 .fill_modes
= drm_helper_probe_single_connector_modes
,
321 .set_property
= intel_dp_mst_set_property
,
322 .destroy
= intel_dp_mst_connector_destroy
,
325 static int intel_dp_mst_get_modes(struct drm_connector
*connector
)
327 return intel_dp_mst_get_ddc_modes(connector
);
330 static enum drm_mode_status
331 intel_dp_mst_mode_valid(struct drm_connector
*connector
,
332 struct drm_display_mode
*mode
)
334 /* TODO - validate mode against available PBN for link */
335 if (mode
->clock
< 10000)
336 return MODE_CLOCK_LOW
;
338 if (mode
->flags
& DRM_MODE_FLAG_DBLCLK
)
339 return MODE_H_ILLEGAL
;
344 static struct drm_encoder
*intel_mst_best_encoder(struct drm_connector
*connector
)
346 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
347 struct intel_dp
*intel_dp
= intel_connector
->mst_port
;
348 return &intel_dp
->mst_encoders
[0]->base
.base
;
351 static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs
= {
352 .get_modes
= intel_dp_mst_get_modes
,
353 .mode_valid
= intel_dp_mst_mode_valid
,
354 .best_encoder
= intel_mst_best_encoder
,
357 static void intel_dp_mst_encoder_destroy(struct drm_encoder
*encoder
)
359 struct intel_dp_mst_encoder
*intel_mst
= enc_to_mst(encoder
);
361 drm_encoder_cleanup(encoder
);
365 static const struct drm_encoder_funcs intel_dp_mst_enc_funcs
= {
366 .destroy
= intel_dp_mst_encoder_destroy
,
369 static bool intel_dp_mst_get_hw_state(struct intel_connector
*connector
)
371 if (connector
->encoder
) {
373 if (!connector
->encoder
->get_hw_state(connector
->encoder
, &pipe
))
380 static void intel_connector_add_to_fbdev(struct intel_connector
*connector
)
382 #ifdef CONFIG_DRM_I915_FBDEV
383 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
384 drm_fb_helper_add_one_connector(&dev_priv
->fbdev
->helper
, &connector
->base
);
388 static void intel_connector_remove_from_fbdev(struct intel_connector
*connector
)
390 #ifdef CONFIG_DRM_I915_FBDEV
391 struct drm_i915_private
*dev_priv
= to_i915(connector
->base
.dev
);
392 drm_fb_helper_remove_one_connector(&dev_priv
->fbdev
->helper
, &connector
->base
);
396 static struct drm_connector
*intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr
*mgr
, struct drm_dp_mst_port
*port
, char *pathprop
)
398 struct intel_dp
*intel_dp
= container_of(mgr
, struct intel_dp
, mst_mgr
);
399 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
400 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
401 struct intel_connector
*intel_connector
;
402 struct drm_connector
*connector
;
405 intel_connector
= kzalloc(sizeof(*intel_connector
), GFP_KERNEL
);
406 if (!intel_connector
)
409 connector
= &intel_connector
->base
;
410 drm_connector_init(dev
, connector
, &intel_dp_mst_connector_funcs
, DRM_MODE_CONNECTOR_DisplayPort
);
411 drm_connector_helper_add(connector
, &intel_dp_mst_connector_helper_funcs
);
413 intel_connector
->unregister
= intel_connector_unregister
;
414 intel_connector
->get_hw_state
= intel_dp_mst_get_hw_state
;
415 intel_connector
->mst_port
= intel_dp
;
416 intel_connector
->port
= port
;
418 for (i
= PIPE_A
; i
<= PIPE_C
; i
++) {
419 drm_mode_connector_attach_encoder(&intel_connector
->base
,
420 &intel_dp
->mst_encoders
[i
]->base
.base
);
422 intel_dp_add_properties(intel_dp
, connector
);
424 drm_object_attach_property(&connector
->base
, dev
->mode_config
.path_property
, 0);
425 drm_mode_connector_set_path_property(connector
, pathprop
);
426 drm_reinit_primary_mode_group(dev
);
427 mutex_lock(&dev
->mode_config
.mutex
);
428 intel_connector_add_to_fbdev(intel_connector
);
429 mutex_unlock(&dev
->mode_config
.mutex
);
430 drm_connector_register(&intel_connector
->base
);
434 static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr
*mgr
,
435 struct drm_connector
*connector
)
437 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
438 struct drm_device
*dev
= connector
->dev
;
439 /* need to nuke the connector */
440 mutex_lock(&dev
->mode_config
.mutex
);
441 intel_connector_dpms(connector
, DRM_MODE_DPMS_OFF
);
442 mutex_unlock(&dev
->mode_config
.mutex
);
444 intel_connector
->unregister(intel_connector
);
446 mutex_lock(&dev
->mode_config
.mutex
);
447 intel_connector_remove_from_fbdev(intel_connector
);
448 drm_connector_cleanup(connector
);
449 mutex_unlock(&dev
->mode_config
.mutex
);
451 drm_reinit_primary_mode_group(dev
);
453 kfree(intel_connector
);
457 static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr
*mgr
)
459 struct intel_dp
*intel_dp
= container_of(mgr
, struct intel_dp
, mst_mgr
);
460 struct intel_digital_port
*intel_dig_port
= dp_to_dig_port(intel_dp
);
461 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
463 drm_kms_helper_hotplug_event(dev
);
466 static struct drm_dp_mst_topology_cbs mst_cbs
= {
467 .add_connector
= intel_dp_add_mst_connector
,
468 .destroy_connector
= intel_dp_destroy_mst_connector
,
469 .hotplug
= intel_dp_mst_hotplug
,
472 static struct intel_dp_mst_encoder
*
473 intel_dp_create_fake_mst_encoder(struct intel_digital_port
*intel_dig_port
, enum pipe pipe
)
475 struct intel_dp_mst_encoder
*intel_mst
;
476 struct intel_encoder
*intel_encoder
;
477 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
479 intel_mst
= kzalloc(sizeof(*intel_mst
), GFP_KERNEL
);
484 intel_mst
->pipe
= pipe
;
485 intel_encoder
= &intel_mst
->base
;
486 intel_mst
->primary
= intel_dig_port
;
488 drm_encoder_init(dev
, &intel_encoder
->base
, &intel_dp_mst_enc_funcs
,
489 DRM_MODE_ENCODER_DPMST
);
491 intel_encoder
->type
= INTEL_OUTPUT_DP_MST
;
492 intel_encoder
->crtc_mask
= 0x7;
493 intel_encoder
->cloneable
= 0;
495 intel_encoder
->compute_config
= intel_dp_mst_compute_config
;
496 intel_encoder
->disable
= intel_mst_disable_dp
;
497 intel_encoder
->post_disable
= intel_mst_post_disable_dp
;
498 intel_encoder
->pre_enable
= intel_mst_pre_enable_dp
;
499 intel_encoder
->enable
= intel_mst_enable_dp
;
500 intel_encoder
->get_hw_state
= intel_dp_mst_enc_get_hw_state
;
501 intel_encoder
->get_config
= intel_dp_mst_enc_get_config
;
508 intel_dp_create_fake_mst_encoders(struct intel_digital_port
*intel_dig_port
)
511 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
513 for (i
= PIPE_A
; i
<= PIPE_C
; i
++)
514 intel_dp
->mst_encoders
[i
] = intel_dp_create_fake_mst_encoder(intel_dig_port
, i
);
519 intel_dp_mst_encoder_init(struct intel_digital_port
*intel_dig_port
, int conn_base_id
)
521 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
522 struct drm_device
*dev
= intel_dig_port
->base
.base
.dev
;
525 intel_dp
->can_mst
= true;
526 intel_dp
->mst_mgr
.cbs
= &mst_cbs
;
528 /* create encoders */
529 intel_dp_create_fake_mst_encoders(intel_dig_port
);
530 ret
= drm_dp_mst_topology_mgr_init(&intel_dp
->mst_mgr
, dev
->dev
, &intel_dp
->aux
, 16, 3, conn_base_id
);
532 intel_dp
->can_mst
= false;
539 intel_dp_mst_encoder_cleanup(struct intel_digital_port
*intel_dig_port
)
541 struct intel_dp
*intel_dp
= &intel_dig_port
->dp
;
543 if (!intel_dp
->can_mst
)
546 drm_dp_mst_topology_mgr_destroy(&intel_dp
->mst_mgr
);
547 /* encoders will get killed by normal cleanup */